> Is it possible mirroring Internet Explorer cached files? 

Well, unfortunetaly not.. the way IE stored files is very 
different from what httrack does. To put it simple, IE 
changes the html pages to rewrite links and add other 
things, but you can't retrive the original form, necessary 
for browsers like httrack. (httrack stored original data in 
a cache, called hts-cache, to handle updates and retries)